Candy stores are competing for the grown-up sweet tooth

First came fancy cupcakes, then macarons, the Frenchified sandwich cookies. Now the upscaling of once-simple pleasures has spread to a new frontier: candy. Upstart companies are launching sweet shops for grown-ups with a taste for luxury and bank accounts to match. "Adults were basically untapped until a few years ago," said Amal Ahmad, an industry analyst with IBISWorld.